公开(公告)号：US10910968B2

公开(公告)日：2021-02-02

申请号：US16451192

申请日：2019-06-25

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Joonsung Park ,  Junhyuk Choi ,  Jinhong Kim ,  Byongjo Hyon ,  Yongsu Noh ,  Dongmyoung Joo

IPC: H03K5/00 ,  H02P6/182 ,  H02P6/10

Abstract: The present disclosure provides a motor drive device and a motor drive system for improving a control stability despite an imbalance in zero crossing points in a sensorless motor of which position of a rotor is estimated by a counter electromotive force. The motor drive device includes: a position detector configured to detect a rotational position of a rotor of a motor by detecting a plurality of zero crossing points of a counter electromotive force induced in the motor; and a controller configured to control the motor by estimating a phase change timing based on a time interval between a current zero crossing point and a previous zero crossing point of a same state as the current zero crossing point among the plurality of zero crossing points detected by the position detector.

公开(公告)号：US20200007056A1

公开(公告)日：2020-01-02

申请号：US16451192

申请日：2019-06-25

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Joonsung PARK ,  Junhyuk CHOI ,  Jinhong KIM ,  Byongjo Hyon ,  Yongsu NOH ,  Dongmyoung JOO

IPC: H02P6/182 ,  H02P6/10

Abstract: The present disclosure provides a motor drive device and a motor drive system for improving a control stability despite an imbalance in zero crossing points in a sensorless motor of which position of a rotor is estimated by a counter electromotive force. The motor drive device includes: a position detector configured to detect a rotational position of a rotor of a motor by detecting a plurality of zero crossing points of a counter electromotive force induced in the motor; and a controller configured to control the motor by estimating a phase change timing based on a time interval between a current zero crossing point and a previous zero crossing point of a same state as the current zero crossing point among the plurality of zero crossing points detected by the position detector.

公开(公告)号：US10374532B2

公开(公告)日：2019-08-06

申请号：US15660140

申请日：2017-07-26

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Joonsung Park ,  Jinhong Kim ,  Byongjo Hyon ,  Junhyuk Choi

IPC: H02P6/12 ,  H02P6/08 ,  H02P29/024 ,  H02P6/24 ,  H02P6/18

Abstract: Disclosed are an apparatus, system and method for detecting, based on a mathematical model, a fault of a permanent magnet motor driven by a square wave. A fault diagnosis apparatus for the permanent magnet motor includes a current voltage measurement unit, a phase shift time calculation unit, and a control unit.